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atsuko

a-a-a-and the MFM RODIME RO352 from our Apricot has stuck :<

Apr 23, 2023, 10:43 PM·Public·Mastodon for iOS
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Public
atsuko

this time i was lucky: the problem was with lost 12V rail on the HDD board, as the traces became fragile and started delaminating and i was constantly reconnecting the molex

gonna bodge it tomorrow, for now here are the photos of the 4 layer board made in 1984

photo of the RODIME hard drive PCB from the back side, closeup near the MOLEX power connector; traces for 12V are not seen; traces for 5V are slightly delaminated
photo of the back side of RODIME hard drive PCB; fill area on the right near the head signal input is delaminated; digit 4 is seen on the bottom of the photo, indicating layer number; traces near the edge connector are all brittle but it not clear from the photo
photo of the front side of RODIME hard drive PCB; assembly date on the sticker glued to the stepper shows 16.04.84
Public
atsuko

there’s mechanical break for a head assembly a plates motor, the break pad for the flywheel is worn out

photo of mechanics of the HDD under the PCB, servo is in bottom left corner, flywheel on the right, relay/break is in the centre and it’s marked KGS 31Ohm 84E
photo of the the break depressed, exposing worn-out pad
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